We are often asked, "how fast are the HV Pro motors," and rarely do we have accurate answers. But now we do! 
Please see the following.

Please note: The following information is for general reference only and should not be used as a specification or expectation of performance. The testing was done with a basic radar gun, a stock Traxxas E-Maxx Truck and dual 2S (7.4 volt) Li-Po battery packs. We ran very short runs without concern for temperature or damage. We do not recommend the same operation or claim that your truck will achieve these same speeds. We recommend staying within the 12-14 tooth pinion gear range for all HV motors. The motor temperature at the end of a run is the most important factor when determining proper gear ratios. 

Using a stock Traxxas E-Maxx with stock tires, a stock spur gear, an upgraded radio (Spektrum DX3R DSM2 3CH Surface Radio) and dual 2S (7.4 volt) Li-Poly battery packs, Novak’s R/C Team ran the four HV Pro motors with the new HV Pro High-Voltage Brushless ESC and three different pinion gears (12T, 14T and 17T). These runs were done in an area that is about 200 feet long. The packs were fully charged for the smallest pinion. We measured two-to-three passes, changed the pinion gear, ran two-to-three passes, changed the pinion and ran the final two-to-three passes. The process was repeated for the next three motors. During the motor change, the same packs were recharged and used again. 

These tests were completed over the course of one day under mild weather conditions.

Please note: The following information is for general reference only and should not be used as a specification or expectation of performance. The testing was done with a basic radar gun, a stock Traxxas E-Maxx Truck and dual 2S (7.4 volt) Li-Po battery packs. We ran very short runs without concern for temperature or damage. We do not recommend the same operation or claim that your truck will achieve these same speeds. We recommend staying within the 12-14 tooth pinion gear range for all HV motors. The motor temperature at the end of a run is the most important factor when determining proper gear ratios.